package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.WebSocket.WebSocketServer;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;
    /**
     * 用户下单
     * @param
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO){
        //异常情况处理（收获地址为空 超出配送范围 购物车为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        //查询当前购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() ==0){
        throw new ShoppingCartBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());
        //像订单插入一条数据
        orderMapper.insert(order);
        //订单详细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for(ShoppingCart cart : shoppingCartList){
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }
        //向表中插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);
        //清理购物车的数据
        shoppingCartMapper.deleteByUserId(userId);
        //封装返回接口
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .build();
        return orderSubmitVO;

   }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
        //////////////////////////////////////////
        Map map = new HashMap();
        map.put("type", 1);
        map.put("orderId",orders.getId());
        map.put("Content", "订单号" + outTradeNo);
        //通过wbe实现来电提醒
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
    /**
     * 历史订单查询
     *
     * @param pageNum
     * @param pageSize
     * @return
     */
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status){
        //设置分页
        PageHelper.startPage(pageNum,pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        //分页查询条件
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList();
        //查询出订单详细 并封装
        if (page != null && page.getTotal() > 0){
            for (Orders orders : page){
                Long orderId = orders.getId();//订单id
                //查询订单详情
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }
    /**
     * 查询订单详情
     *
     * @return
     */
    public OrderVO details(Long id){
        //根据id查询订单
        Orders orders = orderMapper.getByid(id);
        //查寻该订单对应的菜品以及套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        //将订单以及其详情封装到ordervo
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }
    /**
     * 取消订单
     *
     * @return
     */
    public void userCancelById(Long id)throws Exception{
        //根据id查询订单
        Orders ordersDB = orderMapper.getByid(id);
        //校验订单是否存在
        if (ordersDB == null){
            throw new
            OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //订单状态1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2){
            throw new
            OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        //订单处于待接单的状态下取消需要进行退款
        if(ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            //改为退款
            orders.setPayStatus(Orders.REFUND);
        }
        //更新订单状态取消订单原因 取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCheckoutTime(LocalDateTime.now());
        orderMapper.update(orders);
    }
    /**
     * 再来一单
     *
     * @return
     */
    public void repetition(Long id){
        //查询当前用户id
        Long userId = BaseContext.getCurrentId();
        //根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        //将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            //将原订单详情里面的菜品重新复制到购物车中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());
        //将购物车对象批量加入数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }
    /**
     * 订单搜索
     *
     * @param
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO){
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        //部分订单需要额外返回订单菜品信息 将orders 转为ordervo
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }
    private List<OrderVO> getOrderVOList(Page<Orders> page){
        //xuyao返回的菜品信息，自定义响应结果
        List<OrderVO> orderVOList = new ArrayList<>();
        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)){
            for (Orders orders : ordersList){
                //将共同字段复制到Ordervo
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String OrderDishes = getOrderDishesStr(orders);
                //将菜品封装到ordervo 并添加ordervolist
                orderVO.setOrderDishes(OrderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }
    /**
     * 根据订单id查询菜品信息字符串
     *
     * @param
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        //查询订单菜品详细信息
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        //将每一个订单菜品信息拼接为字符串
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());
        //将所有订单信息拼接在一起
        return String.join("",orderDishList);
    }
    /**
     * 各个状态订单统计
     *
     * @param
     * @return
     */
    public OrderStatisticsVO statistics(){
        //根据状态，分别查询出接待单 待排 派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        //将查询出的数据放到orderstatisticsvo中
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }
    /**
     * 接单
     *
     * @param
     * @return
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO){
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }
    /**
     * 拒单
     *
     * @param
     * @return
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO)throws Exception{
        //根据id查询订单
        Orders ordersDB = orderMapper.getByid(ordersRejectionDTO.getId());
        //订单只有在2的状态时才可以拒绝
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new
                    OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID){
            //用户已支付需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }
        //拒单需要退款，根据id更新状态
        Orders orders = new Orders();
        orders.setId(orders.getId());
        orders.setStatus(Orders.CONFIRMED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }
    /**
     * 取消订单单
     *
     * @param
     * @return
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO)throws Exception{
        //根据id查询订单
        Orders ordersDB = orderMapper.getByid(ordersCancelDTO.getId());

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1){
            //用户已支付需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);

            //拒单需要退款，根据id更新状态
            Orders orders = new Orders();
            orders.setId(ordersCancelDTO.getId());
            orders.setStatus(Orders.CANCELLED);
            orders.setCancelReason(ordersCancelDTO.getCancelReason());
            orders.setCancelTime(LocalDateTime.now());
            orderMapper.update(orders);
        }
    }
    /**
     * 派送
     *
     * @param
     * @return
     */
     public void delivery(Long id){
         //根据id查询订单
         Orders ordersDB = orderMapper.getByid(id);
         //校验订单是否存在且状态为三
         if(ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)){
             throw new
                     OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
         }
         Orders orders = new Orders();
         orders.setId(ordersDB.getId());
         //更新订单状态改为派送中
         orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
         orderMapper.update(orders);
     }
    /**
     * 完成
     *
     * @param
     * @return
     */
    public void complete(Long id){
        //根据id查询订单
        Orders ordersDB = orderMapper.getByid(id);
        //校验订单是否存在且状态为4
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new
                    OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        //更新为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }
    /**
     * 用户催单
     *
     * @return
     */
    public void reminder(Long id){
        //查询订单是否存在
        Orders orders = orderMapper.getByid(id);
        if (orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //基于web进行催单
        Map map = new HashMap();
        map.put("type", 2);
        map.put("orderId",id);
        map.put("Content", "订单号" + orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
